CN113971146B - USB hub device with automatic firmware updating function and host system with USB hub device - Google Patents
USB hub device with automatic firmware updating function and host system with USB hub device Download PDFInfo
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- CN113971146B CN113971146B CN202010710285.3A CN202010710285A CN113971146B CN 113971146 B CN113971146 B CN 113971146B CN 202010710285 A CN202010710285 A CN 202010710285A CN 113971146 B CN113971146 B CN 113971146B
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- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 230000002452 interceptive effect Effects 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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Abstract
The USB hub device is applied as an internal hub of the host system, and the host system is provided with a second USB control unit. The USB hub device comprises: the system comprises an uplink port, a hub function module and a plurality of downlink ports, wherein the hub function module is provided with a plurality of first USB control units. After an electronic device is electrically connected to a downstream port, the first USB control unit sends a detection signal to the electronic device, so as to detect whether the electronic device carries at least one firmware update data. Under the condition that the electronic device carries the firmware updating data, the first USB control unit executes a firmware updating mode, so that the hub function module reads the firmware updating data from the electronic device and then stores the firmware updating data into an internal memory unit, thereby completing a firmware updating operation.
Description
Technical Field
The present invention relates to the technical field of universal serial bus (Universal Serial Bus, USB) hubs, and more particularly to a USB hub device with an automatic firmware update function and a host system having the USB hub device.
Background
The universal serial bus (Universal Serial Bus, USB) is a Plug and Play (PnP) input/output interface, which is widely used for data transmission between a personal computer and various peripheral electronic devices, such as: common electronic products such as a mouse, a keyboard, a printer, a scanner, a portable disk (Pen storage drive), a hard disk device, an optical disk device, a game controller, and the like. In the USB protocol, one device must be used as a master (host end) for performing data transmission control, and the other device must be used as a slave (DEVICE END) in opposition. To describe in more detail, the master supplies power and issues commands to the slaves over the universal serial bus, and the slaves cannot initiate any commands to control the bus. For example, the personal computer and the portable disk connected to the personal computer are the main control end and the controlled end of the USB protocol communication respectively.
It should be appreciated that the USB hub allows the master to connect to multiple slaves simultaneously. For example, a host system (e.g., a personal computer or an automobile entertainment system) having an internal USB hub includes an Upstream port and a plurality of Downstream ports, wherein a central processor of the host system is coupled to the Upstream port, and various peripheral devices can communicate with the central processor of the host system through the Downstream ports. In some special cases, the internal USB hub of the host system must be firmware updated. For example, after the operating system of the host system has completed an upgrade, the internal USB hub must be firmware updated to correspond to the upgraded operating system. On the other hand, in the case that the host system and/or the internal USB hub cannot recognize a new electronic device connected to a downstream port, it is also necessary to update the firmware of the internal USB hub.
Currently, an internal USB hub of a general-purpose host system is equipped with a microprocessor chip capable of firmware update. Therefore, when the firmware of the internal USB hub needs to be updated, a special application program can be installed on the operating system of the host system, so that the host system can write the related data for executing the firmware update into the storage unit inside the microprocessor chip through the application program and the uplink port. On the other hand, the host system can also configure the internal USB hub through the application program and the uplink port.
However, for specific host systems such as car entertainment systems, smart televisions, KIOSK interactive resource services systems, and other electronic products with internal USB hubs, users cannot use their personal computers to update the firmware of the internal USB hubs of the specific host systems. More clearly, the user can only send the specific host system back to the factory (Original equipment manufacturer), thereby entrusting the factory to complete the firmware update of the internal USB hub of the specific host system. After the specific host system is returned to the factory, the factory's responsibility engineer will schedule the appropriate time to complete the firmware update of the internal USB hub of the specific host system. It will be readily appreciated that the user must wait a period of time to be able to retrieve the particular host system described above for which the firmware update job was completed by the factory, which necessarily causes inconvenience to the user.
From the foregoing, it is apparent that there is still a need for improvement in the internal USB hubs of specific host systems, such as automobile entertainment systems, smart televisions, KIOSK interactive data services systems, and other electronic products having internal USB hubs. Therefore, the inventor of the present application studied the invention to the greatest extent, and finally developed a USB hub device with an automatic firmware updating function and a host system with the USB hub device.
Disclosure of Invention
The present invention provides a USB hub device with an automatic firmware updating function and a host system with the USB hub device, wherein the USB hub device is applied as an internal hub of the host system, and the host system is provided with a second USB control unit. According to the design of the invention, the USB hub device comprises: the system comprises an uplink port, a hub function module and a plurality of downlink ports, wherein the hub function module is provided with a plurality of first USB control units. After an electronic device is electrically connected to a downstream port, the first USB control unit sends a detection signal to the electronic device, so as to detect whether the electronic device carries at least one firmware update data. Under the condition that the electronic device carries the firmware updating data, the first USB control unit executes a firmware updating mode, so that the hub function module reads the firmware updating data from the electronic device and then stores the firmware updating data into an internal memory unit, thereby completing a firmware updating operation.
It should be noted that, when a first USB control unit cooperates with a downstream port and an electronic device with firmware update data connected to the downstream port performs the firmware update operation on the hub function module, other electronic devices can still perform data communication transmission through the USB hub device and the second USB control unit without being affected.
In order to achieve the above objective, an embodiment of the present invention provides a USB hub device with an automatic firmware update function, which includes:
An upstream port;
the hub function module is coupled with the uplink port and provided with a plurality of first USB control units; and
A plurality of downlink ports coupled to the hub function module for electrically connecting to a plurality of external electronic devices, respectively;
After one of the electronic devices is electrically connected to one of the downlink ports, one of the first USB control units corresponding to the downlink port sends a detection signal to the electronic device so as to detect whether the electronic device carries at least one firmware update data;
When the electronic device carries the firmware update data, the first USB control unit executes a firmware update mode to enable the hub function module to read the firmware update data from the electronic device, and then stores the firmware update data into a memory unit in the electronic device, so that a firmware update operation is completed.
The present invention also provides an embodiment of the host system having at least one internal USB hub, wherein the internal USB hub comprises:
the hub function module is provided with a plurality of first USB control units;
an uplink port coupled to the hub function module and electrically connected to a second USB control unit of the host processor of the host system; and
A plurality of downlink ports coupled to the hub function module for electrically connecting to a plurality of external electronic devices, respectively;
After one of the electronic devices is electrically connected to one of the downlink ports, one of the first USB control units corresponding to the downlink port sends a detection signal to the electronic device so as to detect whether the electronic device carries at least one firmware update data;
When the electronic device carries the firmware update data, the first USB control unit executes a firmware update mode to enable the hub function module to read the firmware update data from the electronic device, and then stores the firmware update data into a memory unit in the electronic device, so that a firmware update operation of the USB hub device is completed.
In an embodiment, the hub function module further includes:
A first physical layer unit coupled to the upstream port;
A repeating circuit unit coupled to the first physical layer unit;
a transmission translator unit coupled to the repeating circuit unit;
A winding logic unit coupled to the transmission translator unit and the repeating circuit unit;
a plurality of second physical layer units coupled to the routing logic unit;
a control unit coupled to the repeating circuit unit;
a first-in first-out memory coupled to the control unit; and
The first USB control units are coupled to the first-in first-out memory and the winding logic unit.
In one embodiment, the memory unit is included in the control unit, and the control unit further includes a microprocessor coupled to the memory unit and a state machine coupled to the microprocessor.
In a practical embodiment, a firmware update data detection unit and a mode switching unit are edited into at least one application program through a function library, a variable or an operand, and then are built in each first USB control unit, so that each first USB control unit has a firmware update data detection function and a firmware update mode switching function.
In one embodiment, the first-in first-out memory includes:
a first-in first-out memory unit coupled between the control unit and the plurality of first USB control units;
A second first-in first-out memory unit;
A first multiplexer coupled between the control unit and the second first-in first-out memory unit;
a second multiplexer coupled between the second first-in first-out memory unit and the plurality of first USB control units; and
A direct memory access unit is coupled between the second multiplexer and the first multiplexer.
In an embodiment, the detection signal includes an identifier acquisition command, and the First USB control unit sends the identifier acquisition command to the electronic device through the downlink port, so as to obtain at least one device information of the electronic device according to a First description information (First descriptor) returned by the electronic device. The device information includes Vendor ID (VID) and Product ID (PID), among others.
In an embodiment, the detection signal further includes a firmware update data authentication command, and the first USB control unit sends the firmware update data authentication command to the electronic device through the downstream port, so as to complete a firmware update data authentication procedure after receiving a second description message (Second descriptor) returned by the electronic device.
Drawings
FIG. 1 is a perspective view of a first host system of a USB hub device with an automatic firmware update function according to the present invention;
FIG. 2 is a perspective view of a USB hub with auto-firmware update function according to the present invention;
FIG. 3 is a first block diagram of a USB hub with auto-firmware update function according to the present invention;
FIG. 4 is a block diagram showing the internal functions of a hub module of the USB hub device with the function of automatically updating firmware according to the present invention;
FIG. 5 is a block diagram showing the internal functions of a first-in-first-out memory of the hub module;
FIG. 6 is a perspective view of a second host system with a USB hub device with auto-firmware update function according to the present invention; and
FIG. 7 is a second block diagram of the USB hub with the function of automatically updating firmware according to the present invention.
[ Symbolic description ]
< Invention >
1:USB line concentration device
10 Hub function module
100 First USB control unit
10P first physical layer Unit
101 Repeating circuit unit
102 Transport translator unit
103 Wire-wound logic unit
104 Second physical layer unit
105 Control unit
1050 Microprocessor
1051 State machine
1052 Memory cell
106 First-in first-out memory
1061 First-in first-out memory unit
1062 Second first-in first-out memory cell
1063 First multiplexer
1064 Second multiplexer
1065 Direct memory access unit
11 Uplink Port
12 Downlink port
Pin power input unit
2 First host system
211 Second USB control unit
3 Electronic device
4 Second host System
411 Third USB control unit
Detailed Description
In order to more clearly describe a USB hub device with an automatic firmware updating function and a host system having the USB hub device according to the present invention, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
Referring to fig. 1, a perspective view of a first host system of a USB hub device with an automatic firmware update function according to the present invention is shown. Fig. 2 is a perspective view of the USB hub device with the function of automatically updating firmware, and fig. 3 is a first block diagram of the USB hub device with the function of automatically updating firmware. In particular, the USB hub device 1 with the function of automatically updating firmware of the present invention can be applied as an internal hub of a first host system 2. Fig. 1 shows the first host system 2 as an automobile entertainment system, but the invention is not particularly limited to the implementation of the first host system 2. In broad terms, the first host system 2 refers to an electronic product with an internal USB hub, and the user cannot use his personal computer to update the firmware of the internal USB hub of the first host system 2. Therefore, in a practical embodiment, the first host system 2 may be an electronic product with an internal USB hub, such as an automobile entertainment system, an audio-visual playing system, a smart television, a smart speaker, a KIOSK interactive resource service system, an electronic measurement device, a server, etc.
As shown in fig. 1, 2 and 3, the USB hub device 1 with the function of automatically updating firmware of the present invention mainly includes: an upstream port 11, a hub function module 10 and a plurality of downstream ports 12, wherein the hub function module 10 is coupled to the upstream port 11 and has a plurality of first USB control units 100. The upstream port 11 is electrically connected to the second USB control unit 211 of the first host system 2. On the other hand, the downstream ports 12 are coupled to the hub function module 10 and are electrically connected to the external electronic devices 3, respectively.
The main technical feature of the present invention is to make the hub function module 10 have a plurality of first USB control units 100. So designed, after an electronic device 3 is electrically connected to a downstream port 12, a first USB control unit 100 corresponding to the downstream port 12 sends a detection signal to the electronic device 3, so as to detect whether the electronic device 3 carries at least one firmware update data. Further, in the case that the electronic device 3 carries the firmware update data, the first USB control unit 100 executes a firmware update mode, so that the hub function module 10 reads the firmware update data from the electronic device 3 and then stores the firmware update data into an internal memory unit 1052, thereby completing a firmware update operation of the USB hub device 1.
For example, after a portable disc (i.e. the electronic device 3) carrying firmware update data is connected to a downstream port 12 of the USB hub device 1 of the present invention, a USB control unit 100 corresponding to the downstream port 12 sends an id acquisition command to the portable disc through the downstream port 12, so as to obtain at least one device information of the electronic device 3 according to a First description information (First descriptor) returned by the portable disc, which includes: vendor Identification (VID) and Product Identification (PID). The USB control unit 100 then sends a firmware update data authentication command to the electronic device 3 (portable disc) through the downstream port 12, so as to complete a firmware update data authentication procedure after receiving a second description message (Second descriptor) returned from the portable disc.
Briefly, by issuing a detection signal, such as an identification code acquisition command and/or a firmware update data authentication command, the USB control unit 100 can detect whether the electronic device 3 is an electronic product for performing a firmware update operation on the USB hub device 1 immediately after one of the electronic devices 3 is connected to one of the downstream ports 12, and simultaneously authenticate the firmware update data carried by the electronic device 3 to confirm the version of the firmware update data. It should be understood that the USB control unit 100 does not execute the firmware update mode in the case where the memory unit 1052 inside the hub function module 10 already stores the latest version of firmware update data.
With continued reference to fig. 1,2 and 3, and with concurrent reference to fig. 4, an internal functional block diagram of the hub function module 10 is shown. According to the design of the present invention, the hub function module 10 further comprises: a first physical layer unit 10P coupled to the upstream port 11, a repeat circuit unit (Hub repeat) 101 coupled to the first physical layer unit 10P, a transmit translator unit (Transaction translator, TT) 102 coupled to the repeat circuit unit 101, a control unit 105 coupled to the repeat circuit unit 101, a first-in-first-out memory 106 coupled to the control unit 105, a Routing logic unit (Routing logic) 103, and a plurality of second physical layer units 104. The routing logic 103 is coupled to the transmission translator unit 102 and the repeating circuit unit 101, and the plurality of second physical layer units 104 are coupled to the routing logic 103. The plurality of first USB control units 100 are coupled to the fifo 106 and the winding logic unit 103.
It should be emphasized that the repeating circuit unit 101, the transmission translator unit 102, and the routing logic unit 103 are all necessary components of the existing USB hub, so that the electronic engineers involved in designing and manufacturing the USB hub for a long time must understand the functions of these circuit units. It should be noted that the memory unit 1052 in the hub function module 10 is included in the control unit 105, and the control unit 105 further includes a microprocessor 1050 coupled to the memory unit 1052 and a state machine (STATE MACHINE) 1051 coupled to the microprocessor 1050. The USB hub device 1 of the present invention further includes a power input unit Pin coupled to the hub function module 10 and electrically connected to an external power supply unit.
With continued reference to fig. 1, 2, 3, and 4, and with concurrent reference to fig. 5, a functional block diagram of the interior of the fifo memory 106 is shown. In one embodiment, the first-in first-out memory 106 comprises: a first FIFO 1061, a second FIFO 1062, a first multiplexer 1063, a second multiplexer 1064, and a DMA unit 1065. As shown in fig. 4, the first fifo 1061 is coupled between the control unit 105 and the plurality of first USB control units 100, and the first multiplexer 1063 is coupled between the control unit 105 and the second fifo 1062. On the other hand, the second multiplexer 1064 is coupled between the second fifo memory unit 1062 and the plurality of first USB control units 100, and the dma unit 1065 is coupled between the second multiplexer 1064 and the first multiplexer 1063.
It is noted that, in case that it is necessary to modify or edit the communication data transferred from the control unit 105 to the fifo 106 or from any of the first USB control units 100 to the fifo 106, an external host (not shown) may access the communication data stored in the second fifo 1062 through the direct memory access unit 1065, and after modifying or editing the communication data, store the modified communication data back to the second fifo 1062.
It is further noted that a firmware update data detection unit and a mode switching unit may be edited as at least one application program through a function library, a variable or an operand, so as to be built in each of the first USB control units 100, so that each of the first USB control units 100 has a firmware update data detection function and a firmware update mode switching function. So designed, when a first USB control unit 100 cooperates with a downstream port 12 and an electronic device 3 with firmware update data connected to the downstream port 12 performs a firmware update operation on the control unit 105 of the hub function module 10, other electronic devices 3 (e.g. a mouse) can still perform data communication transmission with the second USB control terminal 211 of the host processor through the downstream port 12, the hub function module 10 and the upstream port 11 connected thereto, and are not affected.
Referring to fig. 6, a perspective view of a second host system with a USB hub device with an automatic firmware update function according to the present invention is shown. FIG. 7 is a second block diagram of the USB hub device with the function of automatically updating firmware according to the present invention. The USB hub device 1 with the function of automatically updating firmware of the present invention can also be applied as an internal hub of a second host system 4. Fig. 6 shows that the second host system 4 is a notebook computer, which has a third USB control unit 411. The implementation of the second host system 4 is not particularly limited. Broadly speaking, the second host system 4 refers to an electronic product with an internal USB hub, and a user may install a dedicated application program on the operating system of the second host system 4, for example: desktop computers, notebook computers, all-in-one computers, and tablet computers. Through the application program, the third USB control unit 411 and the upstream port 11, the second host system 4 can write the relevant data for executing firmware update into the memory unit 1052 inside the control unit 105 of the hub function module 10. On the other hand, the second host system 4 can also configure the hub function module 10 of the USB hub device 1 according to the present invention through the application program.
Thus, the foregoing has fully and clearly described all the embodiments and features of a USB hub device with automatic firmware updating function and a host system with the USB hub device of the present invention. It should be emphasized that the foregoing disclosure is directed to the preferred embodiments and examples of local variations or modifications that may be derived from the technical ideas of this application are readily apparent to those skilled in the art without departing from the scope of the claims.
Claims (20)
1.A USB hub device with automatic firmware update function, comprising:
An upstream port;
the hub function module is coupled with the uplink port and provided with a plurality of first USB control units; and
A plurality of downlink ports coupled to the hub function module for electrically connecting to a plurality of external electronic devices, respectively;
After one of the electronic devices is electrically connected to one of the downlink ports, one of the first USB control units corresponding to the downlink port sends a detection signal to the electronic device so as to detect whether the electronic device carries at least one firmware update data;
When the electronic device carries the firmware update data, the first USB control unit executes a firmware update mode to enable the hub function module to read the firmware update data from the electronic device, and then stores the firmware update data into an internal memory unit, so that a firmware update operation of the USB hub device is completed.
2. The USB hub device with auto-firmware update function according to claim 1, further comprising a power input unit coupled to the hub function module and electrically connected to an external power supply unit.
3. The USB hub with auto-firmware update function according to claim 1, wherein the upstream port is electrically connected to a second USB control unit of a host system.
4. The USB hub device with auto-update firmware function according to claim 1, wherein the hub function module further comprises:
A first physical layer unit coupled to the upstream port;
A repeating circuit unit coupled to the first physical layer unit;
a transmission translator unit coupled to the repeating circuit unit;
A winding logic unit coupled to the transmission translator unit and the repeating circuit unit;
a plurality of second physical layer units coupled to the routing logic unit;
A control unit coupled to the repeating circuit unit; and
A first-in first-out memory coupled to the control unit;
the first USB control units are coupled to the first-in first-out memory and the winding logic unit.
5. The USB hub with auto-update firmware according to claim 4, wherein the memory unit is included in the control unit, and the control unit further includes a microprocessor coupled to the memory unit and a state machine coupled to the microprocessor.
6. The USB hub with auto-firmware-update function according to claim 5, wherein a firmware-update-data detecting unit and a mode switching unit are edited into at least one application program in the form of a function library, a variable or an operand, and are further built in each of the first USB control units, so that each of the first USB control units has a firmware-update-data detecting function and a firmware-update-mode switching function.
7. The USB hub with auto-update firmware according to claim 4, wherein the FIFO memory comprises:
a first-in first-out memory unit coupled between the control unit and the plurality of first USB control units;
A second first-in first-out memory unit;
A first multiplexer coupled between the control unit and the second first-in first-out memory unit;
a second multiplexer coupled between the second first-in first-out memory unit and the plurality of first USB control units; and
A direct memory access unit is coupled between the second multiplexer and the first multiplexer.
8. The USB hub with auto-firmware update function according to claim 1, wherein the detection signal includes an identifier acquisition command, and the First USB control unit sends the identifier acquisition command to the electronic device through the downlink port, so as to obtain at least one device information of the electronic device according to a First description information (First descriptor) returned by the electronic device.
9. The USB hub device with auto-firmware-update function according to claim 8, wherein the detection signal further includes a firmware-update-data authentication command, and the first USB control unit sends the firmware-update-data authentication command to the electronic device through the downstream port, so as to complete a firmware-update-data authentication procedure after receiving a second description message (Second descriptor) returned by the electronic device.
10. The USB hub device with auto-update firmware according to claim 8, wherein the device information includes Vendor Identification (VID) and Product Identification (PID).
11. The USB hub device with auto-firmware update function according to claim 3, wherein the USB hub device with auto-firmware update function is used as an internal USB hub of the host system.
12. A host system having at least one internal USB hub, the internal USB hub comprising:
the hub function module is provided with a plurality of first USB control units;
An uplink port coupled to the hub function module and electrically connected to the second USB control unit of the host system; and
A plurality of downlink ports coupled to the hub function module for electrically connecting to a plurality of external electronic devices, respectively;
After one of the electronic devices is electrically connected to one of the downlink ports, one of the first USB control units corresponding to the downlink port sends a detection signal to the electronic device so as to detect whether the electronic device carries at least one firmware update data;
When the electronic device carries the firmware update data, the first USB control unit executes a firmware update mode to enable the hub function module to read the firmware update data from the electronic device, and then stores the firmware update data into a memory unit in the electronic device, so that a firmware update operation of the USB hub device is completed.
13. The host system of claim 12, wherein the internal USB hub further comprises a power input unit coupled to the hub function module and electrically connected to an external power supply unit.
14. The host system of claim 12, wherein the hub function module further comprises:
A first physical layer unit coupled to the upstream port;
A repeating circuit unit coupled to the first physical layer unit;
a transmission translator unit coupled to the repeating circuit unit;
A winding logic unit coupled to the transmission translator unit and the repeating circuit unit;
a plurality of second physical layer units coupled to the routing logic unit;
a control unit coupled to the repeating circuit unit;
a first-in first-out memory coupled to the control unit; and
The first USB control units are coupled to the first-in first-out memory and the winding logic unit.
15. The host system of claim 14, wherein the memory unit is included in the control unit, and the control unit further includes a microprocessor coupled to the memory unit and a state machine coupled to the microprocessor.
16. The host system of claim 15, wherein a firmware update data detection unit and a mode switching unit are edited as at least one application program in the form of a function library, a variable or an operand, and are further built in each of the first USB control units, so that each of the first USB control units has a firmware update data detection function and a firmware update mode switching function.
17. The host system of claim 14, wherein the first-in first-out memory comprises:
a first-in first-out memory unit coupled between the control unit and the plurality of first USB control units;
A second first-in first-out memory unit;
A first multiplexer coupled between the control unit and the second first-in first-out memory unit;
a second multiplexer coupled between the second first-in first-out memory unit and the plurality of first USB control units; and
A direct memory access unit is coupled between the second multiplexer and the first multiplexer.
18. The host system according to claim 12, wherein the detection signal includes an identifier acquisition command, and the First USB control unit sends the identifier acquisition command to the electronic device through the downstream port, so as to obtain at least one device information of the electronic device according to a First description information (First descriptor) returned by the electronic device.
19. The host system of claim 18, wherein the detection signal further includes a firmware update data authentication command, and the first USB control unit sends the firmware update data authentication command to the electronic device via the downstream port, so as to complete a firmware update data authentication procedure after receiving a second description message (Second descriptor) returned by the electronic device.
20. The host system of claim 18, wherein the device information includes a Vendor ID (VID) and a Product ID (PID).
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| CN113971146A (en) | 2022-01-25 |
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